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Ammonia dynamic modelling over Cu-SSZ-13 catalyst for NOx emission control in diesel vehicles
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-07-29 , DOI: 10.1039/d0re00253d Biao Liu 1, 2, 3, 4 , Dongwei Yao 1, 2, 3, 4 , Feng Wu 1, 2, 3, 4 , Xiaohan Hu 1, 2, 3, 4 , Yuxi Li 1, 2, 3, 4 , Xinlei Wang 5, 6, 7, 8
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-07-29 , DOI: 10.1039/d0re00253d Biao Liu 1, 2, 3, 4 , Dongwei Yao 1, 2, 3, 4 , Feng Wu 1, 2, 3, 4 , Xiaohan Hu 1, 2, 3, 4 , Yuxi Li 1, 2, 3, 4 , Xinlei Wang 5, 6, 7, 8
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Based on in situ DRIFTS studies of ammonia storage mechanism over the Cu-SSZ-13 catalyst, a temperature-dependent heterogeneity constant was introduced in the traditional dual-site model, and was compared with traditional dual-site and multi-site models based on a series of NH3-TPD experiments in this work. The results showed that the modified dual-site model was in better agreement with experimental NH3-TPD measurements than the traditional dual-site model, and even better than the multi-site model at some temperatures. Moreover, the modified dual-site model was validated under transient conditions with different adsorption concentrations, flushing durations and heating rates. The results showed that the model predicted the NH3-TPD process well under these transient conditions. The accuracy was better than that of the traditional dual-site model, and comparable to that of the multi-site model. The modified dual-site model had similar accuracy, but less parameters compared to the multi-site model, and the reduced model complexity is of great significance for the model-based urea injection control of diesel engines.
中文翻译：
Cu-SSZ-13催化剂氨气动力学模型用于柴油机NOx排放控制
基于原位DRIFTS研究Cu-SSZ-13催化剂上氨气存储机理，在传统的双中心模型中引入了温度相关的非均质常数，并与传统的双中心模型和多站点模型进行了比较。这项工作中的一系列NH 3 -TPD实验。结果表明，与传统的双站点模型相比，改进后的双站点模型与实验性NH 3 -TPD测量具有更好的一致性，在某些温度下甚至优于多站点模型。此外，在瞬态条件下采用不同的吸附浓度，冲洗持续时间和加热速率对改进的双站点模型进行了验证。结果表明，该模型预测了NH 3-TPD在这些瞬态条件下处理良好。准确性优于传统的双站点模型，并且可以与多站点模型相比。改进的双站点模型具有相似的精度，但是与多站点模型相比参数更少，并且减少的模型复杂度对于基于模型的柴油机尿素喷射控制具有重要意义。
更新日期：2020-08-25
中文翻译：
Cu-SSZ-13催化剂氨气动力学模型用于柴油机NOx排放控制
基于原位DRIFTS研究Cu-SSZ-13催化剂上氨气存储机理，在传统的双中心模型中引入了温度相关的非均质常数，并与传统的双中心模型和多站点模型进行了比较。这项工作中的一系列NH 3 -TPD实验。结果表明，与传统的双站点模型相比，改进后的双站点模型与实验性NH 3 -TPD测量具有更好的一致性，在某些温度下甚至优于多站点模型。此外，在瞬态条件下采用不同的吸附浓度，冲洗持续时间和加热速率对改进的双站点模型进行了验证。结果表明，该模型预测了NH 3-TPD在这些瞬态条件下处理良好。准确性优于传统的双站点模型，并且可以与多站点模型相比。改进的双站点模型具有相似的精度，但是与多站点模型相比参数更少，并且减少的模型复杂度对于基于模型的柴油机尿素喷射控制具有重要意义。
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